Space-charge-based electrostatic plasma confinement involving relaxed plasma species
Space-charge-based electrostatic plasma confinement involving relaxed plasma species
复制标题
涉及松弛等离子体物质的基于空间电荷的静电等离子体约束
DOI：
10.1063/1.4764076
复制
发表时间：
2012
影响因子：
2.2
通讯作者：
D. Weathers
中科院分区：
文献类型：
--
作者：
J. Pacheco;C. Ordonez;D. Weathers
本文对表面发射或边缘受限非漂移等离子体的平衡性质进行了数值研究。对服从玻尔兹曼密度分布的非中性等离子体进行了静电势的自洽有限差分计算。非中性等离子体产生的静电势在几何中心有一个极值。求解了非中性等离子体尺寸与边缘德拜长度之比不同的泊松方程。给出了不同比值下的静电势和等离子体密度的分布。然后引入第二个等离子体物种用于两个等离子体物种的限制研究，其中一个物种受到另一个物种的空间电荷的限制，而每个物种遵循玻尔兹曼密度分布。找到了形成中性区的平衡点。还发现了两个物种具有相同的温度和电荷态的平衡。
A numerical study is reported on the equilibrium properties of a surface-emitted or edge-confined non-drifting plasma. A self-consistent finite-differences evaluation of the electrostatic potential is carried out for a non-neutral plasma that follows a Boltzmann density distribution. The non-neutral plasma generates an electrostatic potential that has an extremum at the geometric center. Poisson's equation is solved for different ratios of the non-neutral plasma size to the edge Debye length. The profiles of the electrostatic potential and the plasma density are presented for different values of that ratio. A second plasma species is then introduced for two-plasma-species confinement studies, with one species confined by the space charge of the other, while each species follows a Boltzmann density distribution. An equilibrium in which a neutral region forms is found. An equilibrium is also found in which the two species have equal temperatures and charge states.